GCSE Chemistry Revision Notes (all the hard stuff)

Chemistry Electrolysis -Anode - + - non- surface (anions) -Cathode - - - alloy (cations) -In an sedimentary solution with a responsive coat (Al or G1, G2 element) hydrogen is given at the cathode instead of the metal --> in order to extract the metal solution mustiness be molten, not dissolved -Less reactive metals can be extracted with Carbon -In an aqueous solution with a complex non-metal ion (eg SO4, NO3), O2 is given at the anode 4OH- + 4e- -->2 water supply + 2O2 -Active electrodes (made of metal) - the anodes departure is the cathodes gain fudge sodium chlorides equations Note: An alkali is a base that leave alone dissolve in water All metal oxides argon bases. Some are alkalines. A Salt is all metal compound that can be made from acids Usually births the take a hop metal+halogen H+ (aq) Ions make a solution acidic. Acid + Base --> Salt + water HCl + KOH --> KCl + piddle Acid + Carbonate --> Salt + water + Carbon dioxide 2HCl + MgCO3 --> Mg Cl2 + H2O + CO2 Acid + metallic element --> Salt + hydrogen HCl + Li --> LiCl + H Precipitation Salt Solubility -Cl meltable (except with Pb, Ag) -SO4 Soluble (except with Ba, Ca, Pb) -NO3 Soluble Li-, Na-, K- -All soluble A precipitation chemical reaction takes the form AB (aq) + CD (aq) --> AD (s) + CB (aq) Ions C and B do not change state. These are the spectator ions.

interrogation salts Type of salt (ion)         Test         Precipitate colour Cl         AgNO3         White (AgCl) Br         AgNO3         Cream (AgBr) I         AgNO3  !        Pale sensationalistic (AgI) SO4         BaNO3         White (BaSO4) Flame Tests Li - Red Na - yellowness K - Purple Ca - Brown Ba - immature Cu - Turquoise R Y PB          T G RYP BG T Other test for Cl: Bleaches... If you desire to get a full essay, order it on our website: BestEssayCheap.com

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